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Silicate Fibre Felts, up to 1,200 °C
Silicate is a mineral made of silicon dioxide (SiO2) and other metallic oxides, such as calcium, magnesium, aluminium, etc. Silicate fibre-based textiles offer different thermal, physical and mechanical properties depending on their level of silicon dioxide.
Silicate fibres are known for their great thermal properties. They can withstand high temperatures than glass fibre or basalt fibre. These inorganic fibres don’t contain toxic substances and pose no health risk when handling. They also offer excellent mechanical and chemical properties and are therefore a reliable alternative to ceramic fibres.
Thanks to their thermal resistivity, silicate fibre felts are suitable for high-temperature applications. As they can withstand peak temperatures up to 1,200 °C and operating temperatures up to 1,100 °C, they are used in the industry for thermal insulation as well as the assembly of heat protection. Their good properties also make it possible to use silicate fibre felts for electrical insulation and soundproofing.
The silicate fibre felts proposed by Final Advanced Materials are available untreated or with a heat cleaned treatment in thicknesses ranging from 3 to 25 mm. They contain no organic binder. A mechanical bonding of the fibres provides felts that are compact, soft and stable during their processing.
For more information regarding the availability, refer to the technical data sheet.
Applications of Silicate Fibre Felts
- Thermal insulation
- Electrical insulation
- Soundproofing
- Component for heat protection's assembly
General Data: Silicate Fibre
Technical Data: Silicate Fibre
Physical variables included in this documentation are provided by way of indication only and do not, under any circumstances, constitute a contractual undertaking. Please contact our technical service if you require any additional information.
FAQs that can help you in this category
Felts made from carbon/graphite fibre are excellent at withstanding high temperatures, and are used up to 3,000°C. These felts are stable up to 2,000°C, but only in an inert, oxygen-free environment. Otherwise, they oxidise above 300°C. Unlike carbon/graphite felts, zirconia felts are resistant to temperatures up to 2,000°C, even in the presence of oxygen in the environment.
Final Advanced Materials' biosoluble fibre felts are a safe alternative to replace asbestos-based insulation or other refractory fibres. These fibres have low biopersistence, meaning the body can eliminate any inhaled fibre rapidly and naturally. These felts have a low thermal conductivity and a temperature resistance of up to 1,400°C, and are used primarily as oven coatings, but also as a customisable local thermal insulation.
The only felts capable of withstanding a continuous exposure to temperatures exceeding 1,500°C are ceramic (Al2O3), zirconia (ZrO2) or graphite fibre-based felts. Each felt has specific constraints: graphite felts can only be used in an inert atmosphere or in a vacuum, while zirconia felts have poor mechanical properties, and ceramic fibre felts can only resist temperatures up to 1,650°C.
The other felt families (glass, silica, biosoluble, RCF, basalt, etc.) cannot withstand a continuous exposure to more than 1,260°C.
The material has a thermal conductivity of 0.06 W/m·K at 200°C, and 0.30 W/m·K at 1,000°C. It is substantially lower than that of conventional refractory materials (often between 1 and 2 W/m·K at these temperatures). The felts offered by Final Advanced Materials are available in several densities, ranging from 64 to 160 kg/m3. The higher the density, the lower the conductivity which can go as low as 0.20 W/m·K at 1,000°C.